package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //将前端传送过来的明文密码进行MD5加密
         password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    public void save(EmployeeDTO employeeDTO) {
        System.out.println("当前线程ID" + Thread.currentThread().getId());
        //将DTO对象转换为实体
        Employee employee = new Employee();
        //对象属性拷贝简化代码量
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置新增员工初始化状态 0禁用 1正常  StatusConstant设置账号的各个状态 防止产生硬编码
        //employee.setStatus(1);
        //优化
        employee.setStatus(StatusConstant.ENABLE);
        //设置新增员工密码  默认密码123456
        //employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //优化
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置创建时间 修改时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());
        //设置当前记录创建人id和修改人id
        //Todo 目前暂时写死（10L）  后期需要优化代码
        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.save(employee);
    }

    /**
     * 分页查询
     * @param pageQueryDTO
     * @return
     */
    @Override
    public PageResult selectByPage(EmployeePageQueryDTO pageQueryDTO) {
        //分页查询 select * from employee limit 0,10
        //使用PageHelper可以帮我们自动拼接页码字符串
        PageHelper.startPage(pageQueryDTO.getPage(),pageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.selectByPage(pageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        return new PageResult(total,result);
    }

    @Override
    public void StartOrStop(Integer status, long id) {
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employeeMapper.update(employee);
    }


    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void Update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }


    /**
     * 根据员工id查询
     *
     * @param id
     * @return
     */
    @Override
    public Employee SelectById(long id) {
        Employee employee = employeeMapper.selectById(id);
        //密码不给查看  处理一下
        employee.setPassword("***");
        return employee;
    }


}
